How do we know fish don't think?
They know where to get food, they remember their territory boundaries, they remember the pecking order, they bicker and fight with each other, they don't cope with change very well, some are brave, some are timid, some love to watch your every move, they appear to have personalities, some like my purple tang are just jerks... Dont get me wrong I don't think they ponder the meaning of life, just not sure we can definitively say everything they do is just instinct. One thing I'm certain about is they do get scared and do suffer
On that note, is the cognitive capacity of a fish what should determine what ethical considerations we owe them? If reduced capacity to “think” is the marker used, do we owe less ethical consideration to people who have cognitive impairments or who are in persistent vegetative states? It would also almost certainly mean we owe more ethical consideration to pigs and crows than we do to dogs, for example.


